DockArt is a great, free program only available for Mac, that belongs to the category Customize your Mac with subcategory iTunes Accesories (more specifically Cd Covers & Lyrics).
More about DockArt
DockArt is available for users with the operating system Mac OS X and prior versions, and it is only available in English. Its current version is 1.2.2 and it has been updated on 2/29/2008.
Since we added this program to our catalog in 2007, it has obtained 1,060 downloads, and last week it gained 0 downloads.
About the download, DockArt is a reasonably light program that will not require as much storage than many software in the section Customize your Mac.